筒内噴射式火花点火機関

Japanese Patent JP4092442

B2

PROBLEM TO BE SOLVED: To suppress the generation of NOx in stratified combustion by advancing the opening timing of one of two intake valves more than the opening timing of the other intake valve, setting a phase difference in opening timing between both the intake valves, and forming a valve recess in a position corresponding to one intake valve in a piston crown surface. SOLUTION: A phase difference in opening timing is set to intake valves 5A, 5B arranged in a first and second intake ports 7A, 7B, and the opening timing of the intake valve 5A is advanced more than that of an intake valve 5B. In a low load area where a stratified combustion is performed, the valve overlap between the intake valve 5A and an exhaust valve 6A is large, which actively increases the internal EGR quantity. A valve recess is provided in a position corresponding to the intake valve 5A in a piston crown surface, so that the injected fuel can be collided to the circumferential wall surface on the side having the valve recess by a swirl flow in the initial stage of the fuel injection to a cavity combustion chamber through a fuel injection valve 11 in stratified combustion to transfer all the fuel to an ignition plug 10 side by laying it on the swirl flow.

Toru Noda

JP25562297A

May 28, 2008

September 19, 1997

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Nissan Motor Co., Ltd

F01L13/00; F02D13/02; F02B17/00; F02B23/08; F02B23/10; F02B29/08; F02D41/02; F02F3/26; F02B75/12

JP7247847A
JP8260988A
JP7026993A
JP4183945A
JP8035429A
JP4339131A
JP58142326U
JP2094329U
JP9014103A
JP4153563A
JP10205413A

Hidekazu Miyoshi
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu

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